99985972 has 12 divisors (see below), whose sum is σ = 175536676. Its totient is φ = 49832640.

The previous prime is 99985927. The next prime is 99985973. The reversal of 99985972 is 27958999.

It can be written as a sum of positive squares in 2 ways, for example, as 43375396 + 56610576 = 6586^2 + 7524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99985973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38679 + ... + 41182.

Almost surely, 2^99985972 is an apocalyptic number.

It is an amenable number.

99985972 is a deficient number, since it is larger than the sum of its proper divisors (75550704).

99985972 is a wasteful number, since it uses less digits than its factorization.

99985972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80178 (or 80176 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 58.

The square root of 99985972 is about 9999.2985754002. The cubic root of 99985972 is about 464.1371782769.

The spelling of 99985972 in words is "ninety-nine million, nine hundred eighty-five thousand, nine hundred seventy-two".